Fireproof structure of the upper frame of the sliding door

Abstract

To prevent formation of a gap in an upper frame that is detrimental to fire protection when a door body of a sliding door is in a fully closed position.SOLUTION: An upper frame 3 of a suspended sliding door is made up of an upper frame body 3' and an inspection cover 4. The inspection cover 4 includes a supported portion (upper end portions of a face 40 and horizontal piece 41) formed at the upper end of the face 40 and a plurality of rising engagement pieces 42. The upper frame body 3' includes a rising support piece 353 that contacts and supports the supported portion of the inspection cover 4, and a contacting portion 351' that the rising engagement pieces 42 contact from the inside. One or more combustible elements are provided inside the upper frame 3. The inspection cover 4, which includes a first fastening piece 42A located on the door end side of a door end-side suspension wheel unit 66 of a door body 6 in a fully closed position, a second fastening piece 42B located a door tail side of a door tail-side suspension wheel unit 66, and a third fastening piece 42C located between the door end-side suspension wheel unit 66 and the door tail-side suspension wheel unit 66, maintains the contact between the rising support piece 353 and the supported portion in the vicinity of the combustible elements.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fireproof structure for an upper frame of a sliding door, and more particularly to a fireproof structure for an upper frame equipped with an inspection cover. [Background technology]

[0002] A top hung sliding door opens and closes an opening by sliding left and right as the rollers of the left and right hanging wheel units provided at the upper end of the door body run on rails, and a moving mechanism including a rail is provided above the opening. In such a top hung sliding door, the upper frame above the opening is composed of an upper frame body and an inspection cover that can be attached and detached from the upper frame body for the purpose of mounting components and maintenance. The structure of such an upper frame equipped with an inspection cover is disclosed in, for example, Patent Document 1.

[0003] There are cases where such top hung sliding doors are desired to be used as fire prevention equipment. There are flammable elements in the top frame. For example, from the viewpoint of quietness when the door body is moving, resin rollers are often used, and there is a risk that the resin of the rollers will melt and ignite due to the influence of heat from a fire, etc. Resin elements are often used in the moving mechanism, and there is a risk that these resin elements will melt and ignite due to the heat of a fire. In fire prevention equipment, it is required that flames do not appear outside the top frame even if these flammable elements ignite.

[0004] Here, in an upper frame equipped with an inspection cover as disclosed in Patent Document 1, the heat during a fire may cause the inspection cover to deform, forming a gap between the inspection cover and the upper frame body that is unfavorable in terms of fire prevention. If a combustible element inside the upper frame ignites in this state, flames may come out from the gap. Patent Document 1 does not mention fire prevention performance at all. [Patent Document 1] Patent No. 4842073 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The present invention aims to prevent the formation of gaps in the upper frame that are disadvantageous in terms of fire prevention when the door body of a sliding door is in a fully closed position. [Means for solving the problem]

[0006] The technical means adopted in the present invention are: The upper frame of the top hung sliding door is composed of an upper frame body and an inspection cover detachably attached to the upper frame body, The inspection cover includes a surface portion forming a first side mounting surface of the upper frame, a supported portion formed in a longitudinal direction at an upper end of the surface portion, and a plurality of locking pieces formed to rise from a plurality of positions in the longitudinal direction of the supported portion, a first side portion of the upper surface of the upper frame body includes an attachment portion including a support piece that abuts against and supports the supported portion of the inspection cover, and an abutment portion that maintains the abutment state between the supported piece and the support portion by the locking piece of the inspection cover abutting from the inside; Within the upper frame, one or more combustible elements are provided near the leading end side hoist of the door body in the fully closed position, and one or more combustible elements are provided near the trailing end side hoist of the door body in the fully closed position, The plurality of locking pieces include a first locking piece located on the door-end side of the door-end side hanging wheel of the door body in the fully closed position, a second locking piece located on the door-end side of the door-end side hanging wheel of the door body in the fully closed position, and a third locking piece located between the door-end side hanging wheel and the door-end side hanging wheel of the door body in the fully closed position, and maintain a state of contact between the support piece and the supported part in the vicinity of the combustible element. This is the fireproof structure of the upper frame of the sliding door. In one embodiment, the "first side" is the interior side.

[0007] In one embodiment, the supported portion comprises an upper end portion of the face portion and a horizontal piece formed on the upper end of the face portion, the portion of the horizontal piece corresponding to the locking piece is a wide portion, and the locking piece is formed to rise from the wide portion, The support piece abuts against or is adjacent to the upper end portion of the face portion from the inside, and its upper end abuts against the horizontal piece of the inspection cover from below to support it.

[0008] In one embodiment, an insertion portion is formed immediately below each of the abutment portions in the mounting portion of the upper frame body, The inspection cover is attached by inserting the locking piece into the insertion portion from the front with the locking piece in an approximately horizontal position and rotating it downward so that the locking piece abuts or is close to the abutted portion from the inside.

[0009] In one embodiment, the first locking piece is formed at a door-end side end of the inspection cover, The second locking piece is formed at the trailing edge of the inspection cover. In one embodiment, a door-end side insertion portion is formed at the door-end side end of the mounting portion of the upper frame body, and a door-end side abutment portion against which the door-end side locking piece abuts is formed directly above the door-end side insertion portion, A trailing edge side insertion portion is formed at the trailing edge side end of the mounting portion of the upper frame body, and a trailing edge side abutment portion against which the trailing edge side locking piece abuts is formed directly above the trailing edge side insertion portion.

[0010] In one embodiment, the door end side hoist and braking device are provided above the door body, located on the door end side of the third locking piece, The door-end side hoist and the braking device include combustible elements.

[0011] In one embodiment, the door end side suspension wheel and the brake device are provided above the door body, located on the door end side of the third locking piece, The trailing edge side hoist and the braking device include combustible elements.

[0012] In one embodiment, a resin rack, which is a flammable element, is provided within the upper frame, positioned from the vicinity of the third locking piece toward the door end. Effect of the Invention

[0013] In the present invention, the multiple locking pieces of the inspection cover abut against the abutted portion of the upper frame body from the inside, thereby resisting thermal deformation of the upper end portion of the inspection cover and maintaining the abutting state between the support piece (upper frame body) and the supported portion (inspection cover) near the flammable elements in the upper frame between the multiple locking pieces, preventing the formation of a gap that is disadvantageous in terms of fire prevention between the upper end portion of the inspection cover and the attached portion of the upper frame body, and preventing flames from escaping to the outside from the upper end portion of the upper frame even if a flammable element ignites within the upper frame. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of the sliding door according to the present embodiment (when the opening is fully closed) as viewed from the indoor side. [Diagram 2] FIG. 2 is a vertical cross-sectional view (hooking portion) of the sliding door according to this embodiment, with the left side being the inside of the room and the right side being the outside of the room. [Diagram 3] FIG. 2 is a cross-sectional view of the sliding door according to the present embodiment, with the upper side facing the outside and the lower side facing the inside. [Figure 4] FIG. 2 is a vertical cross-sectional view (support portion) of the upper portion of the sliding door according to this embodiment, with the left side facing the inside of the room and the right side facing the outside of the room. [Diagram 5] 13(A) and (B) are front views showing the upper portion of the sliding door according to this embodiment, with the inspection cover removed (upper frame body). [Figure 6] 6 is a view similar to FIG. 5, showing yet another embodiment. [Figure 7] 1A and 1B are cross-sectional views of the inspection cover, where the left figure is a cross-sectional view at the hook portion and the right figure is a cross-sectional view at the support portion. [Figure 8] 4A and 4B are top and front views of the inspection cover. [Figure 9] This is a diagram explaining the installation of the inspection cover to the upper frame body, where the upper diagram shows the fit between the hook portion of the inspection cover and the insertion portion of the upper frame body, and the lower diagram shows the fit between the support portion of the inspection cover and the recess in the upper frame body. [Figure 10] This is a conceptual diagram showing the occurrence of gaps due to deformation of the upper frame caused by heat during a fire. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present invention will be described with reference to the drawings. The overhead sliding door according to this embodiment is a manual single sliding door, and can be used as a fire prevention facility. Fig. 1 is a front view of the sliding door according to this embodiment (when the opening is fully closed) as seen from the maintenance side (in this embodiment, the room side), Fig. 2 is a vertical cross-sectional view (hooking part) of the sliding door according to this embodiment, the left side being the room side and the right side being the room side, Fig. 3 is a horizontal cross-sectional view of the sliding door according to this embodiment, the upper side being the room side and the lower side being the room side. Fig. 4 is a vertical cross-sectional view (support part) of the upper part of the sliding door according to this embodiment, the left side being the room side and the right side being the room side.

[0016] The sliding door is equipped with a sliding door frame formed of a leading edge vertical frame 1, a trailing edge vertical frame 2, and an upper case or upper frame 3. The upper frame 3 is composed of an upper frame body 3' and an inspection cover 4. The leading edge vertical frame 1, the trailing edge vertical frame 2, and the upper frame body 3' are attached to the frame structure, and the upper frame 3 (upper frame body 3' and inspection cover 4) extends between the upper end of the leading edge vertical frame 1 and the upper end of the trailing edge vertical frame 2. An intermediate vertical frame 5 is provided in the middle between the leading edge vertical frame 1 and the trailing edge vertical frame 2, located on the outside of the room.

[0017] The leading half of the space between the leading vertical frame 1 and the trailing vertical frame 2 forms an opening that is opened and closed by the door body 6, and the trailing half forms a storage area for the door body 6. More specifically, the opening is a vertically rectangular space formed by the leading vertical frame 1, the intermediate vertical frame 5, the leading half of the upper frame 3, and the floor FL, and the storage area is a vertically rectangular space formed by the trailing vertical frame 2, the intermediate vertical frame 5, the trailing half of the upper frame 3, and the floor FL.

[0018] The door-end vertical frame 1 according to this embodiment has an interior facing surface 10, an exterior facing surface 11, and a visible surface 12 facing the opening, and the visible surface 12 has a recess 120 into which the door-end side portion of the door body 6 fits when the opening is fully closed, an interior portion 121, and an exterior portion 122, the visible dimensions of the exterior portion 122 being larger than the visible dimensions of the interior portion 121, and the exterior portion of the door-end vertical frame 1 is an exterior protruding portion that protrudes to the outside of the opening. In the exterior protruding portion, a wall body W is located on the side of the visible surface 12 facing the exterior portion 122.

[0019] The trailing edge vertical frame 2 in this embodiment has an interior facing surface 20 and a projected surface 21 that faces the storage section. A wall body W is located on the exterior side of the interior facing surface 20. The interior facing surface 10 of the leading edge vertical frame 1 and the interior facing surface 20 of the trailing edge vertical frame 2 are flush with each other. A door stopper 22 is provided on the projected surface 21 of the trailing edge vertical frame 2.

[0020] The intermediate vertical frame 5 according to this embodiment is located entirely on the exterior side of the movement path (opening) of the door body 6, and has an interior facing surface 50, an exterior facing surface 51, and a facing surface 52. The facing surface 52 of the intermediate vertical frame 5 faces the exterior portion 122 of the facing surface 12 of the end vertical frame 1. The exterior facing surface 11 of the end vertical frame 1 and the exterior facing surface 51 of the intermediate vertical frame 5 are flush with each other. The facing surface 52 of the intermediate vertical frame 5 extends beyond the interior facing surface 50 toward the interior side, and a gap 53 is formed at the tip of the frame 52, facing the interior facing surface 50, and a gap 530 is formed between the interior facing surface 50 and the facing surface 53.

[0021] The door body 6 has an interior facing surface 60, an exterior facing surface 61, a leading edge surface 62, a trailing edge surface 63, an upper end portion 64, and a lower end portion 65. A hoist unit 66 is provided at the upper end portion 64 of the door body 6, located at the leading edge portion and the trailing edge portion, and the hoist unit 66 is provided with a resin roller 67. The resin roller 67 of the hoist unit 66 provided at the upper end portion 64 rolls on a rail 7 inside the upper frame 3, causing the door body 6 to move left and right to open and close the opening.

[0022] The lower end 65 of the door body 6 is concave, and an anti-sway rail 650 is provided inside. When the door body 6 moves, a roller 651 located on the floor surface FL at the end of the opening slides against the anti-sway rail 650.

[0023] At the upper end 64 of the door body 6, a pair of L-shaped recessed pieces 640 are provided so as to protrude toward the interior side from the interior facing surface 60 of the door body 6, and the pair of recessed pieces 640 include a horizontal piece 6400 and a hanging piece 6401. At the upper end 64 of the door body 6, a plate-shaped body 641 is further provided so as to be U-shaped in cross section, and the plate-shaped body 641 includes a horizontal portion 6410 and rising pieces 6411, 6411 at both ends in the width direction of the horizontal portion 6410. The projected dimension of the horizontal portion 6410 of the plate-shaped body 641 is larger than the projected dimension (door thickness) of the door body 6, and the rising pieces 6411, 6411 of the plate-shaped body 641 are located slightly inside the interior facing surface 60 of the door body 6 and slightly outside the exterior facing surface 61 of the door body 6, respectively. A recessed piece 630 having an L-shape in a plan view is provided on the trailing end surface 63 of the door body 6 so as to protrude toward the outside of the room beyond the exterior facing surface 61 of the door body 6, and the recessed piece 630 consists of a facing piece 6300 and a facing piece 6301 extending from the tip of the facing piece 6300 toward the door tip.

[0024] The upper frame 3 is composed of an upper frame body 3' and an inspection cover 4, and the inspection cover 4 in this embodiment constitutes the interior side portion of the upper frame 3. The upper frame body 3' is attached to the frame structure, and the inspection cover 4 is detachably attached to the upper frame body 3'. Both the upper frame body 3' and the inspection cover 4 are longitudinal members extending between the upper end portion of the leading vertical frame 1 and the upper end portion of the trailing vertical frame 2. Both ends of the upper frame body 3' in the longitudinal direction abut against the upper end portion of the visible surface 12 of the leading vertical frame 1 and the upper end portion of the visible surface 21 of the trailing vertical frame 2, respectively, and both ends of the inspection cover 4 in the longitudinal direction are close to the upper end portion of the visible surface 12 of the leading vertical frame 1 and the upper end portion of the visible surface 21 of the trailing vertical frame 2, respectively.

[0025] The upper frame body 3' is provided with an exterior facing portion 30, an upper surface portion 31, and an exterior frame body 32 that is provided at the lower end of the exterior facing portion 30 and protrudes to the exterior. The outer surface of the exterior facing portion 30 is the exterior side surface portion 300 of the upper frame 3, and the rail 7 is supported on the inner surface 301 of the exterior facing portion 30. The exterior frame body 32 is provided with an interior facing surface 320, an exterior facing surface 321, and a horizontal lower surface 322. The exterior facing surface 321 is approximately flush with the exterior facing surface 11 of the end vertical frame 1 and the exterior facing surface 51 of the middle vertical frame 5, but is located slightly outside in the illustrated embodiment. A three-sided frame is formed by the exterior portion of the end vertical frame 1, the middle vertical frame 5, and the exterior frame body 32, located on the exterior side of the opening.

[0026] A mounting portion for detachably mounting the upper end portion of the inspection cover 4 is provided along the length of the upper surface portion 31 of the upper frame body 3' on the indoor side. The mounting portion includes a support piece (rising support piece 353) that supports the support portion (upper end portion of the surface portion 40, horizontal piece 41) of the inspection cover 4, and an abutment portion (abutment portion 351') against which the hook portion (rising locking piece 42) of the inspection cover 4 abuts. The configuration of the mounting portion will be described in detail. As described later, the rising locking pieces 42A, 42B, 42C abut against the abutment portion 351' to form the hook portions 38A, 38B, 38C.

[0027] The indoor side portion of the upper surface 31 of the upper frame body 3' is formed with a hanging piece 33 which forms the upper end portion of the indoor side visible surface of the upper frame 3, and a horizontal piece 34 which extends from the lower end of the hanging piece 33 toward the inside of the upper frame 3, and a locking piece 35 is provided on the indoor side portion of the lower surface of the upper surface 31.

[0028] The engaged piece 35 consists of an upper horizontal piece 350 fixed to the underside of the upper surface portion 31, a vertical piece 351 hanging down from the room-side end of the upper horizontal piece 350, a lower horizontal piece 352 extending into the room from the lower end of the vertical piece 351 facing the horizontal piece 34, and a rising support piece 353 at the tip of the lower horizontal piece 352. The tip of the horizontal piece 34 abuts against the vertical piece 351, and the lower horizontal piece 352 is located below the horizontal piece 34 and faces it. The rising support piece 353 is located slightly inside the upper frame 3 relative to the hanging piece 33.

[0029] The lower half of the engaging piece 35 (the lower half of the vertical piece 351, the lower horizontal piece 352, and the rising support piece 353) is cut out at several points along the length to form insertion portions 35A, 35B, and 35C, and an abutment portion 351' is formed from the upper half of the vertical piece 351 directly above the insertion portions 35A, 35B, and 35C.

[0030] As shown in Fig. 5 and Fig. 6, in this embodiment, the insertion part 35A is formed at the leading end of the upper frame body 3' (the latched piece 35), the insertion part 35B is formed at the trailing end of the upper frame body 3' (the latched piece 35), and the insertion part 35C is formed at the leading half (a part located above the opening) of the upper frame body 3' (the latched piece 35), more specifically, between the leading end side hoist unit 66 of the door body 6 in the fully closed position and the trailing end side hoist unit 66. That is, the latched piece 35 according to this embodiment has three abutment parts 351' formed at the leading end, the trailing end, and between the leading end side hoist unit 66 of the door body 6 in the fully closed position and the trailing end side hoist unit 66.

[0031] At the upper end of the indoor side portion of the upper frame body 3', a recess 36 extending horizontally in the width direction is formed from the horizontal piece 34 and the upper end of the rising support piece 353, and insertion portions 35A, 35B, 35C and abutment portions 351' are formed on both sides of the recess 36.

[0032] As shown in Figures 7 and 8, the upper end portion of the inspection cover 4 comprises a surface portion 40 which forms the interior facing surface of the upper frame 3, and a horizontal piece 41 formed at the upper end of the surface portion 40 and extending to the exterior side, and a plurality of portions in the length direction of the horizontal piece 41 are wide portions 41' (wide portions 41A', 41B', 41C') which extend horizontally to the exterior side, and a plurality of rising engagement pieces 42 (42A, 42B, 42C) are formed to rise at the ends of the wide portions 41A', 41B', 41C'. The lower end portion of the surface portion 40 comprises a horizontal piece 43 formed at the lower end of the surface portion 40, and a rising piece 44 at the tip of the horizontal piece, and a lower end piece 45 is fixed to the horizontal piece 43 and the rising piece 44.

[0033] The upper end portion of the inspection cover 4 is provided with a supported portion consisting of the upper end portion of the face portion 40 and a horizontal piece 41, and hook portions (rising locking pieces 42A, 42B, 42C) formed at multiple locations in the length direction of the supported portion. The supported portion of the inspection cover 4 is located at a position corresponding to the support piece (rising support piece 353) and recess 36 of the upper frame main body 3', and the multiple rising locking pieces 42 (42A, 42B, 42C) of the inspection cover 4 are formed at positions corresponding to the insertion portions 35A, 35B, 35C and multiple abutment portions 351' of the upper frame main body 3', respectively.

[0034] 8, in this embodiment, the rising locking piece 42A is formed at the leading edge end of the inspection cover 4, the rising locking piece 42B is formed at the trailing edge end of the inspection cover 4, and the rising locking piece 42C is formed at the leading edge half of the inspection cover 4 (a portion located above the opening), more specifically, between the leading edge side hoist unit 66 and the trailing edge side hoist unit 66 of the door body 6 in the fully closed position. The portion located between the rising locking piece 42A and the rising locking piece 42C, and the portion located between the rising locking piece 42B and the rising locking piece 42C form the supported portion (the upper end portion of the surface portion 40 and the horizontal piece 41).

[0035] The inspection cover 4 is removably attached to the mounting portion of the upper frame body 3' via its upper end portion (the supported portion consisting of the upper end portion of the face portion 40 and the horizontal piece 41, and the rising locking pieces 42A, 42B, 42C). As shown in Figures 2 and 4, when the upper end portion of the inspection cover 4 is attached to the mounting portion of the upper frame body 3', the rising support piece 353 of the mounting portion abuts or is close to the upper end portion of the face portion 40 of the inspection cover 4 from the inside, the upper end of the rising support piece 353 abuts against the horizontal piece 41 of the inspection cover 4 from below, and the rising locking pieces 42 (42A, 42B, 42C) of the upper end portion of the inspection cover 4 abut or are close to the abutment portion 351' of the mounting portion from the inside.

[0036] In the bearing parts 37A, 37B (see FIG. 1) where the inspection cover 4 is supported on the upper frame body 3', the supported part and the bearing piece are in contact (the rising bearing piece 353 of the attached part is in contact with or close to the upper end part of the face part 40 of the inspection cover 4 from the inside, and the upper end of the rising bearing piece 353 is in contact with the horizontal piece 41 of the inspection cover 4 from below), so that no gap is generated in the bearing parts 37A, 37B. In the hook parts 38A, 38B, 38C (see FIG. 1) provided on both sides of the bearing parts 37A, 37B, the rising locking pieces 42A, 42B, 42C at the upper end part of the inspection cover 4 are in contact with the abutment part 351' of the attached part from the inside, so that the contact state between the supported piece and the bearing part in the bearing parts 37A, 37B is maintained and the generation of gaps in the bearing parts 37A, 37B is prevented as much as possible.

[0037] The lower end piece 45 fixed to the lower end of the inspection cover 4 is composed of a lower piece 450, a rising piece 451, and an upper piece 452 folded back from the upper end of the rising piece 451 so as to face the lower piece 450, and a thermal expansion fireproof member 46 is provided adjacent to the upper part of the rising piece 451. The horizontal piece 43 of the inspection cover 4 and the lower surface 322 of the exterior frame body 32 provided on the exterior side of the upper frame main body 3' are located at the same height, and an opening is formed between the rising piece 44 at the lower end of the inspection cover 4 and the interior facing surface 320 of the exterior frame body 32 to receive the upper end of the door body 6. A thermal expansion fireproof member 323 is provided on the interior facing surface 320 of the exterior frame body 32 so as to face the thermal expansion fireproof member 46.

[0038] As shown in Figure 9, the inspection cover 4 is inserted from the front with the surface portion 40 in an approximately horizontal position, and the support portion at the tip (upper end) (the upper end portion of the surface portion 40 and the horizontal piece 41) and the rising locking pieces 42 (42A, 42B, 42C) are aligned with the recess 36 at the upper end of the indoor side portion of the upper frame main body 3' and the insertion portions 35A, 35B, 35C, respectively.

[0039] At this time, the rising locking pieces 42A and 42B of the inspection cover 4 are formed at the leading end and trailing end of the inspection cover 4, respectively, and the insertion parts 35A and 35B of the upper frame body 3' are formed at the leading end and trailing end of the upper frame body 3', respectively, so that the inspection cover 4 can be satisfactorily positioned relative to the upper frame body 3' by matching both ends in the length direction (opening width direction). When the inspection cover 4 is inserted into the upper frame body 3', the leading end edge and trailing end edge of the inspection cover 4 are respectively placed against the upper end position of the visible surface 12 of the leading vertical frame 1 (leading end edge of the insertion part 35A) and the upper end position of the visible surface 21 of the trailing vertical frame 2 (trailing end edge of the insertion part 35B), so that the upper end position of the visible surface 12 of the leading vertical frame 1 and the visible surface 21 of the trailing vertical frame 2 can be used as positioning guides.

[0040] When the rising locking pieces 42A, 42B, 42C of the inspection cover 4 are inserted into the upper frame body 3' from the insertion parts 35A, 35B, 35C, the tips of the rising locking pieces 42A, 42B, 42C extend to the back side of the abutment part 351' directly above the insertion parts 35A, 35B, 35C. When the inspection cover 4 is moved downward from this state while maintaining the horizontal position, the tip part (upper end part) of the face part 40 of the inspection cover 4 abuts against the upper end of the rising support piece 353, and the inspection cover 4 is rotated downward with this abutment part as a fulcrum until the face part 40 is in a vertical position, whereby the upper end part of the inspection cover 4 is attached to the attachment part of the upper frame body 3'. Then, the lower end side of the face part 40 of the inspection cover 4 is fixed to the fixed piece 47 with the screw 48, so that the lower end part of the inspection cover 4 is fixed (see FIG. 2). The fixed piece 47 is provided in a protruding manner on the upper end portion of the leading edge vertical frame 1 and the upper end portion of the trailing edge vertical frame 2, or on the upper frame body 3'.

[0041] The movement mechanism of the door body 6 will be described. Inside the upper frame 3, a rail 7 extending in the opening width direction is provided. The rail 7 according to this embodiment is provided on the inner surface 301 of the exterior facing portion 30 of the upper frame body 3', and the door end side end extends to a position close to the projection surface 12 of the door end side vertical frame 1, and the door tail side end extends to the upper part of the storage section (at least the position corresponding to the hoist unit 66 on the door tail side of the door body 6 when the opening is fully opened). The door body 6 moves left and right by the plastic roller 67 of the hoist unit 66 provided at the upper end 64 rolling on the rail 7 inside the upper frame 3 to open and close the opening. The overhead sliding door according to this embodiment is a manual type, and the rail 7 according to this embodiment is gently inclined upward from the door end side to the door tail side, so that when the door body 6 is released from the hand when the opening is fully opened, the door body 6 moves in the closing direction by its own weight.

[0042] As shown in Figures 5(A), (B) and 6, the top hung sliding door according to this embodiment is equipped with a braking mechanism. The braking mechanism is made up of a braking device 8 provided on the hoist unit 66 and a resin rack 9 provided at a predetermined portion of the rail 7 (the door leading end portion and the door trailing end portion), and when the moving door body 6 reaches a predetermined position, a gear (not shown) of the braking device 8 meshes with the rack 9 to brake the door. The resin roller 67 of the hoist unit 66 and the resin rack 9 are combustible elements, and the braking device 8 partially contains a combustible element such as resin.

[0043] In the embodiment shown in Fig. 5(B), a smoke detection interlocking device 13 capable of holding the door body 6 in the fully open position is provided inside the upper frame 3, and when smoke during a fire is detected while the door body 6 is held in the fully open position, the smoke detection interlocking device 13 is activated to release the held state of the door body 6, and the door body 6 closes under its own weight. The smoke detection interlocking device 13 is located above the leading edge portion of the door body 6 in the fully open position, and this position is approximately the same as the position above the trailing edge portion of the door body 6 in the fully closed position. The smoke detection interlocking device 13 contains a flammable element such as resin in part.

[0044] In the embodiment shown in Fig. 6, a smoke detector interlocking device 13 capable of holding the door body 6 in any open position is provided inside the upper frame 3, and when smoke during a fire is detected while the open position is maintained, the smoke detector interlocking device 13 is activated to release the holding state of the door body 6, and the door body 6 is closed by its own weight. The smoke detector interlocking device 13 includes a device main body 13', a long member 130 provided at the upper end portion of the door body 6 between the hoist unit 66 on the door front side and the hoist unit 66 on the door rear side, and a door roller 131 provided between the hoist unit 66 on the door front side and the hoist unit 66 on the door rear side. The main body 13' of the smoke detector interlocking device 13 is located above the door rear side portion of the door body 6 in the fully closed position, and the main body 13' contains a flammable element such as resin in a part thereof.

[0045] The sliding door according to this embodiment can be used as a fire prevention facility, and when the opening is fully closed, no gaps penetrating from the inside to the outside are formed on the leading and trailing ends of the door body 6. The leading end part including the leading end face 62 of the door body 6 in the fully closed position is located within the recess 120 of the projecting surface 12 of the leading vertical frame 1, and the facing piece 6301 of the interlocking piece 630 provided on the trailing end face 63 of the door body 6 fits into the gap 530 of the intermediate vertical frame 5, forming an interlocking structure on the leading and trailing ends (see FIG. 3).

[0046] A plurality of flammable elements are present in the internal space of the upper frame 3. Examples of the flammable elements include the resin rollers 67, the resin rack 9, the resin elements included in the braking device 8, the resin elements included in the smoke detection interlocking device 13, and oil present in the moving parts of the moving mechanism of the door body 6 (for example, grease on the resin rollers and oil in the braking device 8). An example of the resin element included in the braking device 8 is a resin gear (not shown) provided outside the case of the braking device 9. The resin element included in the smoke detection interlocking device 13 is located inside the case of the smoke detection interlocking device 13. As shown in Figures 5 and 6, the plastic roller 67, braking device 8 and the front-end portion of the plastic rack 9 are located near the front-end hoist unit 66 of the door body 6 in the fully closed position, and the plastic roller 67, braking device 8, smoke detection interlocking device 13 (Figure 5(B)) and main body 13' of the smoke detection interlocking device 13 (Figure 6) are located near the rear-end hoist unit 66 of the door body in the fully closed position.

[0047] The upper end of the door body 6 is received in the lower end of the upper frame 3, and a smoke bypass is formed from the horizontal piece 6400 and the hanging piece 6401 of the interlocking piece 640 provided at the upper end 64 of the door body 6 and the upper piece 452 of the lower end piece 45 fixed to the lower end of the inspection cover 4, until smoke generated inside the upper frame 3 is discharged from the gap between the upper end of the indoor side facing surface 60 of the door body 6 and the lower end of the upper frame 3, and the gap between the upper end of the indoor side facing surface 60 of the door body 6 and the lower end of the upper frame 3 is closed by the heat expansion fireproof member 46 provided at the lower end of the inspection cover 4 being heated and foamed. The gap between the upper end of the outdoor facing surface 61 of the door body 6 and the lower end of the upper frame 3 is closed by the heat expansion fireproof member 323 provided on the outdoor frame 32 being heated and foamed.

[0048] The formation of gaps that are disadvantageous in terms of fire prevention is prevented at the upper end portion of the upper frame 3 (the attachment portion of the upper end portion of the inspection cover 4 to the attached portion of the upper frame body 3'). When the inspection cover 4 is attached to the upper frame body 3', as shown in Figures 2 and 4, the rising support piece 353 of the attached portion abuts or is close to the upper end portion of the face portion 40 of the inspection cover 4 from the inside, the upper end of the rising support piece 353 abuts against the horizontal piece 41 of the inspection cover 4 from below, and the rising locking pieces 42A, 42B, 42C at the upper end portion of the inspection cover 4 abut or are close to the abutted portion 351' of the attached portion from the inside.

[0049] The inspection cover 4 is supported on the upper end of the rising support piece 353 with the upper end portion of the face portion 40 abutting or close to the side of the rising support piece 353, and at the support portions 37A and 37B, the upper end portion of the face portion 40 of the inspection cover 4 abuts or is close to the side of the rising support piece 353, and the horizontal piece 41 extends from the upper end of the rising support piece 353 into the recess 36, so that the space between the upper end portion of the inspection cover 4 and the mounting portion of the upper frame main body 3' is sealed and no gaps are created.

[0050] In this state, if heat during a fire acts on the upper frame 3, the support part at the upper end of the inspection cover 4 (the upper end part of the surface part 40, the horizontal piece 41) may deform so as to move away from the rising support piece 353 of the upper frame body 3', and a gap may be generated between the upper end part of the inspection cover 4 and the attached part of the upper frame body 3' (see FIG. 10). In this embodiment, the three rising locking pieces 42A, 42B, 42C abut against the abutment part 351' from the inside to form the hook parts 38A, 38B, 38C, thereby preventing the formation of a gap that is disadvantageous in terms of fire prevention between the upper end part of the inspection cover and the attached part of the upper frame body 3' at the support parts 37A, 37B. A more detailed explanation will be given below.

[0051] Hook portions 38A and 38C are located on both sides of the length (opening width direction) of the support portion 37A, and the raised engagement pieces 42A and 42C at the upper end portion of the inspection cover 4 abut or come close to the inner surface of the abutment portion 351' of the attached portion, thereby resisting the movement of the upper end portion (supported portion) of the inspection cover 4 away from the upper frame main body 3' toward the inside of the room. When the door body 6 is in the fully closed position, a door-end side hoist unit 66 equipped with a plastic roller 67, a braking device 8, and a plastic rack 9 are positioned in the internal space of the upper frame 3 in correspondence with the support portion 37A, and the hook portion 38A (rising locking piece 42A and abutment portion 351') and hook portion 38C (rising locking piece 42C and abutment portion 351') maintain the abutment state between the supported piece (rising support piece 353) and the support portion (upper end portion of the surface portion 40, horizontal piece 41) in the support portion 37A, preventing gaps from occurring in the support portion 37A as much as possible.

[0052] Hook portions 38C and 38B are located on both sides of the length (opening width direction) of the support portion 37B, and the raised engagement pieces 42C and 42B at the upper end portion of the inspection cover 4 abut or come close to the inner surface of the abutment portion 351' of the attached portion, thereby resisting the movement of the upper end portion (supported portion) of the inspection cover 4 away from the upper frame main body 3' toward the inside of the room. When the door body 6 is in the fully closed position, a tail-side hoist unit 66 equipped with a plastic roller 67, a braking device 8, and a smoke detection interlocking device 13 (Figures 5(B) and 6) are located in the internal space of the upper frame 3, corresponding to the door-end side portion of the support part 37B. The hook part 38C (rising locking piece 42C and abutment part 351') and hook part 38B (rising locking piece 42B and abutment part 351') maintain the abutment state between the supported piece (rising support piece 353) and the support part (upper end part of the surface part 40, horizontal piece 41) in the support part 37B, preventing as much as possible the occurrence of gaps in the support part 37B (especially the door-end side portion close to the hook part 38C).

[0053] In hook portions 38A, 38B, 38C, when the rising engagement pieces 42A, 42B, 42C at the upper end of the inspection cover 4 abut or are close to the inner surface of the abutment portion 351' of the attached part, the wide portions 41A', 41B', 41C' of the horizontal piece 41 extending from the lower ends of the rising engagement pieces 42A, 42B, 42C toward the inside of the room are positioned at the lower end of the abutment portion 351' of the attached part, so that the space between the upper end of the inspection cover 4 and the attached part is sealed and no gaps are created.

[0054] In this embodiment, the rising locking piece 42C at the upper end of the inspection cover 4, the insertion part 35C of the upper frame body 3', and the contact part 351' corresponding to the insertion part 35C are at a fixed position from the door end, which is particularly effective in cases where a flammable element (resin rack 9) located on the door end side is ignited. More specifically, the resin rack 9 located on the opening side is a long material extending in the moving direction of the door body 6, has a relatively large volume, and is easily ignited by flames and heat in the event of a fire (especially when the source of fire is on the outside of the room). In addition, since the resin rack 9 on the door end side brakes (slows down) the door body 6 when it approaches the fully closed position, the position of the resin rack 9 on the door end side is approximately constant even if the width dimension (opening width dimension) of the door body 6 changes. In addition, this embodiment mainly assumes a case where the source of fire is on the outside of the room, and since the wall body W is located on the outside of the resin rack 9 located on the storage side, the possibility of the resin rack 9 on the door end side catching fire is low. In the upper frame 3, above the tail end side of the door body 6 in the fully closed state of the opening, the smoke detector interlocking device 13 including a flammable element and the main body 13' of the smoke detector interlocking device 13 are located. Since these flammable elements are inside the case, the plastic rack 9 on the tail end side is more likely to burn in the event of a fire. In this embodiment, the hooking part 38C (the contact part 351' corresponding to the rising locking piece 42C and the insertion part 35C) located between the tail end side hoisting unit 66 and the tail end side hoisting unit 66, at a certain position from the tail end, and located near the plastic rack 9 on the tail end side suppresses thermal deformation of the inspection cover 4, and prevents flames from escaping to the outside even if the plastic rack 9 on the tail end side is ignited. The roller 131 (FIG. 6) of the smoke detector interlocking device 13 is a plastic roller and is a flammable element, but since the roller 131 is located near the hooking part 38C, the part of the inspection cover 4 located near the roller 131 is less likely to deform.

[0055] In addition, in the embodiments shown in Figures 5(B) and 6, by providing a smoke detection and interlocking device 13 and a main body 13' of the smoke detection and interlocking device 13 within the upper frame 3, the height dimension of the internal space of the upper frame 3 is larger than that of the embodiment shown in Figure 5(A).In the event that a flammable element inside the upper frame 3 ignites, the structure makes it more difficult for flames to escape to the outside between the upper end portion of the inspection cover 4 and the upper frame main body 3' than in the embodiment shown in Figure 5(A).

[0056] Although the overhead sliding door according to this embodiment is a manual type, the present invention can also be applied to an electric sliding door, an automatic door, and the like. In addition, although a single sliding door with one door body 6 is shown in this embodiment, the present invention can also be applied to, for example, a split sliding door with two door bodies. In this embodiment, an inspection cover is provided above each door body in a fully closed position of the opening, and the trailing edge portion of one inspection cover is located at the upper end portion of one vertical frame, and the trailing edge portion of the other inspection cover is located at the upper end portion of the other vertical frame, and the leading edge portions of the one and the other inspection covers are adjacent to each other. [Explanation of symbols]

[0057] 3 Top Frame 3´ Upper frame body 31 Top part 353 Rising support piece (support piece) 351´ Abutted part 35A Insertion part (Door end side insertion part) 35B Insertion part (end of door insertion part) 35C Insertion section 4 Inspection cover 40 Surface portion (surface portion forming the first side attachment surface) 41 horizontal piece 41´, 41A´, 41B´, 41C´ Wide section 42 Rising locking piece (locking piece) 42A First rising locking piece (first locking piece) 42B Second rising locking piece (second locking piece) 42C Third rising locking piece (third locking piece) 6 Door body 66 Hanging wheel unit (hanging wheel) 67 Plastic roller 7 Rail 8 Braking device 9 Plastic Rack

Claims

1. The upper frame of the top hung sliding door is composed of an upper frame body and an inspection cover detachably attached to the upper frame body, The inspection cover includes a surface portion forming a first side mounting surface of the upper frame, a supported portion formed in a longitudinal direction at an upper end of the surface portion, and a plurality of locking pieces formed to rise from a plurality of positions in the longitudinal direction of the supported portion, a first side portion of the upper surface of the upper frame body includes an attachment portion including a support piece that abuts against and supports the supported portion of the inspection cover, and an abutment portion that maintains the abutment state between the supported portion and the support piece by the locking piece of the inspection cover abutting from the inside; Within the upper frame, one or more combustible elements are provided near the leading end side hoist of the door body in the fully closed position, and one or more combustible elements are provided near the trailing end side hoist of the door body in the fully closed position, The plurality of locking pieces include a first locking piece located on the door-end side of the door-end side hanging wheel of the door body in the fully closed position, a second locking piece located on the door-end side of the door-end side hanging wheel of the door body in the fully closed position, and a third locking piece located between the door-end side hanging wheel and the door-end side hanging wheel of the door body in the fully closed position, and maintain a state of contact between the support piece and the supported part in the vicinity of the combustible element. Fireproof structure of the upper frame of the sliding door.

2. The supported portion is composed of an upper end portion of the face portion and a horizontal piece formed on the upper end of the face portion, the portion of the horizontal piece corresponding to the locking piece is a wide portion, and the locking piece is formed to rise from the wide portion, The support piece abuts against or is close to the upper end portion of the face portion from the inside, and the upper end abuts against the horizontal piece of the inspection cover from below to support it. A fireproof structure for the upper frame of a sliding door according to claim 1.

3. An insertion portion is formed immediately below each abutment portion in the mounting portion of the upper frame body, The inspection cover is attached in a state where the locking piece is inserted into the insertion part from the front side with the locking piece in a substantially horizontal position and rotated downward so that the locking piece abuts or comes close to the abutted part from the inside. A fireproof structure for an upper frame of a sliding door according to any one of claims 1 and 2.

4. The first locking piece is formed at a door-end side end of the inspection cover, The second locking piece is formed at a tail end of the inspection cover. A fireproof structure for an upper frame of a sliding door according to any one of claims 1 to 3.

5. A door-end side insertion portion is formed at the door-end side end of the mounting portion of the upper frame body, and a door-end side abutment portion against which the first locking piece abuts is formed directly above the door-end side insertion portion, A trailing edge side insertion portion is formed at the trailing edge side end of the mounting portion of the upper frame body, and a trailing edge side abutting portion with which the second locking piece abuts is formed immediately above the trailing edge side insertion portion. A fireproof structure for the upper frame of a sliding door as described in claim 4 (limited to those dependent on claim 3).

6. The door end side suspension wheel and braking device are provided above the door body, located on the door end side of the third locking piece, The door end side hoist and the braking device include combustible elements. A fireproof structure for an upper frame of a sliding door according to any one of claims 1 to 5.

7. The door end side suspension wheel and the brake device are provided above the door body and positioned on the door end side of the third locking piece, The door trailing side hoist and the braking device include combustible elements. A fireproof structure for an upper frame of a sliding door according to any one of claims 1 to 6.

8. A resin rack, which is a flammable element, is provided in the upper frame, located near the third locking piece toward the door end. A fireproof structure for an upper frame of a sliding door according to any one of claims 1 to 7.

Images